What Causes Oil Burning in Peugeot 408?
2 Answers
The main symptom of oil burning is the emission of blue smoke from the exhaust pipe, accompanied by a noticeable increase in engine oil consumption. Here are the specific reasons: 1. Natural wear: As the vehicle's mileage increases, the wear between the piston and cylinder gradually intensifies. When this wear reaches a certain level, cylinder blow-by will occur, leading to oil burning. If the valve stem seals are damaged, the oil burning phenomenon will become more pronounced. 2. Improper maintenance: Following the manufacturer's recommended maintenance schedule will extend the engine's lifespan. Conversely, neglecting maintenance or exceeding the recommended service intervals can accelerate engine wear. Dirty oil or impurities in the oil will hasten cylinder wear. 3. Incorrect air filter selection: If the air filter fails to adequately purify the air entering the cylinders, dust and particles will enter, accelerating cylinder wear. Poor-quality oil filters may not effectively filter impurities from the oil. Using counterfeit oil or oil that does not meet the vehicle's specified grade can prevent the formation of a proper oil film on engine friction surfaces, potentially causing severe cylinder scoring or, in milder cases, blow-by.
I've been driving a Peugeot 408 for several years, and the oil burning issue is really frustrating. Common causes might include severely worn piston rings allowing oil to seep into the combustion chamber, resulting in blue smoke from the exhaust. This is quite common in high-mileage vehicles, or it could be due to aging valve stem seals leaking oil. I need to regularly check the dipstick - if consumption is too fast, it's suspicious. Additionally, a failed turbocharger oil seal can also cause leakage, especially noticeable during acceleration. PCV system failure is troublesome too, with excessive carbon buildup blocking oil vapor return. Oil burning not only costs money but also damages the engine and shortens its lifespan, so I recommend getting it checked at a professional shop early - replacing piston rings or seals before major problems arise. Be diligent with routine maintenance; using quality oil can help slow down wear.
